Does raw domain count matter more than repeat-cited authority? | Trakkr Research
Raw domain count and repeat citation count answer different questions. The index shows 529,165 domains and a 7.04% share for the top three, but it does not measure “authority” as a causal variable.
Methodology: Built from 48,422,016 citation appearances across 529,165 unique domains in the latest valid snapshot for 1,643 tracked brands, observed from October 3, 2025 to August 18, 2026.
Direct Answer
Raw domain count and repeat citation count answer different questions. The index shows 529,165 domains and a 7.04% share for the top three, but it does not measure “authority” as a causal variable.
What this means
This answer matters because it turns a study finding into an operating rule teams can use when they decide what to publish, refresh, or measure next.
Evidence table
| Metric | Value | Why it matters |
|---|---|---|
| Unique domains | 529,165 | Distinct normalized domains in the current brand snapshots. |
| Unique cited URLs | 2.60M | 2,602,557 distinct cited URLs in the current snapshot. |
| Top three domain share | 7.04% | YouTube, English Wikipedia, and Reddit together account for 7.04%. |
Frequently Asked Questions
Does raw domain count matter more than repeat-cited authority?
Raw domain count and repeat citation count answer different questions. The index shows 529,165 domains and a 7.04% share for the top three, but it does not measure “authority” as a causal variable.
Which numbers from AI Citation Index matter most here?
Unique domains: 529,165. Distinct normalized domains in the current brand snapshots. Unique cited URLs: 2.60M. 2,602,557 distinct cited URLs in the current snapshot.
What should a team do next?
Audit the domains that already dominate your category and decide which ones are realistic citation targets. Build source-worthy pages for the query shapes where AI is already citing third parties. Treat reference, review, and social sources as part of your AI visibility surface, not as noise.
What to do next
Related pages
Continue through the same study cluster.
- which sources dominate ai citations - Related answer page
- how concentrated is the ai citation landscape - Related answer page
- social sources are material not noise - Related fact page
- top cited domain tracker - Related tracker page
Data & Sources
- AI Citation Index - Flagship study behind this page
- Page JSON - Machine-readable companion file